field



ing the overlapped ends of the foot boards, and means connected with another one of said runs and with the foot boards beyond the overlapped ends of the foot boards and relatively bracing said supporting structure and the foot boards and holding the latter in place upon the first mentioned rung.

7, In a scaffold of the class described, a supporting structure, foot boards mounted thereon and having relatively adjacent overlapped ends, the supporting structure including side members and a rung extending c between the side members and supporting the overlapped ends'of the foot boards, means anchoring the said overlapping ends of the footboards to the said rung, a rung connecting the side members of the structure beloW foot boards.

ALFRED O. FARLEY.

E. A. FIELD on. BURNER Filed June 25, 1923 May 21,, 1929. 4 1,714,216

2 Sheets-Sheet 1 A TTORNEY.$

Patented May 21, 1929.

UNITED STATES 2 1,714,216 PATENT. OFFICE.

EDWARD A. FIELD, or CHICAGO, ILLINOIS, AssIGNoR T FIELD ENGINEERING 00., or

' CHICAGO, ILLINOIS, A CORPORATION o LLINo s.

OIL BURNER.

Application fi1ed'J'une'25, 1923. Serial No. 647,657.

"This invention relates to improvements in j oil burners.

, being supplied to the burner.

Fourth, to'providean improved oil burner having these advantages which may be quickly installedin furnaces of types now in quite common use. 7

Further objects, and objects relating to structural details, will definitely appear from the detailed description to follow.

The objects of the invention are accom- L plishedby the devices and means described in the following specification. The invention is clearly defined and pointed out in the claims. a

A structure which is a preferred embodiment of the invention is clearly defined and illustrated in the accompanying drawing, forming a part of this application, in which: Fig. I is a fragmentary side-elevation of a hot air furnace having my improved oil burner installed therein, the furnace being shown in conventional form and for the purpose of illustrating the mannerof installation.

Fig. II is a detail vertical section on a line corresponding to line 22 of Fig. III.

Fig. III is 'a horizontal section on a line corresponding to line 33 of Fig. II.

Fig. IV is a detail section through the vaporizing head on a line corresponding to line 1-4 of Fig. 'II.'

' Fig. V is a fragmentary plan view of the fan removed from the spindle.

Fig. VI isa detail section on a line corresponding to line 6-6 of Fig. II.

In the drawing similar reference characters refer to similar parts throughout the several views and the sectional views are taken looking in the direction ofthe little arrows at the ends of the section lines).

Referring to the drawing, 1 represents the furnace body and 2 the surrounding hot air casing. 3 represents the furnace grates and 4 the 'ashpit door having the regulating damper 5. The smoke flue isprovided with a damper 6. These parts areshown conventionally 'and-forthe purpose of showing the installation of my improvements. A

'Mv improved burner comprises a body which 'in the embodiment illustrated is formed of an outer burner member 7, an

inner burner me1nber 8 and an intermediate burner "member 9. These burner members are cylindrical and disposed in concentric,

spaced relation, providing an air passage 10 open at the bottom of'the outer burner memher and delivering to the bottomof thecomrbustionchamber 11. The inner burner memher is provided with an outwardly curved flange 12 at its upper end, the edge of the I flange seating on the top of the outer burner member 7, thus providing an air passage having an outer upward reachor portion and an inner downward reach or portion, the downward reach or portionsurrounding the combustion chamber so that the air is'heated on its passage to the combustion chamber. The intermediate burner member is provided with abottom 13 having central air inlets 14 surrounded by the upwardly projecting tubular part 15. The bottom has cleanout openings 16 whichare normally closed by the cleanout damper '17 which has registering openings 18 therein. A connection 191s provided or manipulating the damper 17. The

bottom is conformed to provide a trough 20 to which the drain pipe21 is connected, so that in the event of any considerable surplus of fuel it is drained off through this drain connection 21. This drain connection 21 delivers to a drain receptacle 22 having afloat 23 therein, for controlling the valve 24' in the fuel supply pipe 25 which leads from the fuel supply reservoir-26. A pair of nozzles 27 is connected tothe pipe 25 to project through the walls of the burner body. These nozzles have downwardly directed delivery orifices 28. The spindle'29 is supported by the self-lubricatingbearing 30 carried by the arm 31 and by the end cross bearing 32 withinthe bearing member 33 which is disposed centrally of the'air inlets 14 so that this bottom bearing is cooled by the air passing around the same. The bearing member 32 is chambered to receive the lubricant, being connected by the pipe 34 to i to a suitable lubricant supply or the pipe may be extended so that the lubricant may be introduced thereto as required.

For convenience in assembling the inner body member 8 is provided with a slot which permits its being dropped over the arm 31, the arm having a depending closure 36 V passage 10 and also that entering through the inlets 14. The fan is provided with a hub portion 39 which is notched at its lower end to engage the transverse pin 40 on the spindle. This provides a convenient means for assembling and disassembling.

The atomizing head, designated generally by the numeral 41, is mounted on the spindle in coacting relation to the fuel nozzles. This atomizing head comprises a top deflector plate 42 which is disposed in a plane above the nozzles but adjacent thereto. The annular distributing or atomizing plate 43 is disposed below the nozzle so that the fuel is discharged thereto. A fan 44 is provided having blades 46 projecting beyond the periphery of the plate 43, the purpose being to assist in breaking up and atomizing fuel and also to assist in driving the spindle. The head is open at the bottom within the distributing plate and has side delivery openings 45.

With this arrangement of parts the fuel is effectively atomized and very eliicient and complete combustion is secured. The fuel feed pipe 25 is provided with a fuel regulating valve 24. The dampers 5 and 6 of the furnace regulate the supply of air.

In the event of failure of ignition or the temporary stoppage of the flow of oil such as would extinguish the flame, the flow being renewed is collected by thetrough 2O delivering to the drain receptacle 21 and actuates the float 23 to close the valve 24, thereby stopping the flow of fuel.

The cleanout damper is provided in the event that there should be a collection of ash or residue.

The structure is readily disassembled should occasion require by the removal of the nozzles which may be pulled out by swinging the couplings 47 to one side. The head may then be lifted off as it is supported by the pin 48 engaging a notch in the upper end of the spindle.

My improved burner is very efficient, is readily installed and requires very little attention in use. It is very effective in the comsumption of heavy oils and distillate.

I have illustrated and described my im provements in an embodiment which I have found very practical in use. I have not attempted to illustrate or describe certain embodiments or adaptations which I contemplate as I believe the disclosure made will enable those skilled in the art to which this invention relates to embody or adapt the same as may be desired.

Having thus described the invention what is claimed and desired to secure by Letters Patent, is:

1. In an oil burner, the combination of cylindrical outer, inner and intermediate burner members disposed in spaced concentric relation, the outer member being open at the bottom, the inner member having an outwardly curved flange at its upper end resting on the top of the outer member, the intermediate member having a bottom spaced from the lower end of said inner member whereby a return air passage is provided delivering into the bottom of the inner member, said bottom having a central air inlet surrounded by a collar and being conformed to provide a trough and having cleanout openings therein, a drain connection for said trough, a damper for said openings, a spindle disposed centrally of said inner member, an impelling fan disposed on said spindle adjacent the lower end of said inner burner member, fuel delivery nozzles projecting into said inner burner member, and an atomizing head mounted on said spindle in coacting. relation to said nozzles.

2. In an oil burner, the combination of cylindrical outer, inner and intermediate burner members disposed in spaced concentric relation, the outer member beingopen at the bottom, the inner member having an outwardly curved flange at its upper end resting on the top'of the outer member, the intermediate member having a bottom spaced from the lower end of said inner member whereby a return air passage is provided delivering I into the bottom of the inner member, said bottom having a central air inlet, a spindle disposed centrally of said inner member, an impelling fan disposed on said spindle adj acent the lower end of said inner burner member, fuel delivery nozzles projecting into said inner burner member, and an atomizing head mounted on said spindle in coacting relation to said nozzles.

3. In an oil burner, the combination ofcylindrical. outer, inner and intermediate burner members disposed in spaced concentric relation, the outer member being open at the bottom, the inner member having an outwardly curved flange at its upper end resting on the top of the outer member, the interme diate member having a bottom spaced from the lower end of said inner member whereby a return air passage is provided delivering into the bottom of the inner member, said bottom having a central air inlet surrounded by a collar and being conformed to provide a trough and having cleanout openings therein,

a drain connection for said'trough, a-damper for said openings, a spindle disposed centrally of said inner member, an end bearing th'ere- Y 4. In an oil burner, the combination of cy-' lindrical outer, inner and intermediate burner members disposed in spaced concentric relation, the outer member being open at the bottom, the inner member having an outwardly curved flange at its upper endresting on the top of the outer member, the intermediate member having a bottom spaced from the lower end of said inner member whereby areturn air passage is provided delivering into the bottom of the inner member, said bottom having a central air inlet, a spindle disposed centrally of said inner member, an impelling fan disposed on said spindle adjacent the lower end of said inner burner member, fuel delivery nozzles projecting into said inner burner member to deliver downwardly therein, an atomizing head mounted on saidspin-.

dle andcomprising a top deflector plate disposed in aplane above the nozzles, and an annular deflector plate disposedbelow said nozzles, said head being provided with fan blades at the periphery of said atomizing plate and having a bottom-opening within said atomizing plate and side openings below said deflector plate.

5. In an oil lindrical outer, inner and intermediate burner members disposed'in spaced concentric re lation, the outer and inner members being open at the bottom,the inner member having an outwardly curved flange at its upper end resting on the top of the outer member, the intermediate. member having a bottom spaced from the lower end of said inner member whereby a return air passage is provided delivering into the bottom of the. inner member, said bottom having cleanout openings therein, a damper for said openings, a spindle disposed centrally of said inner member, an atomizing head mounted on said spindle within said inner member, an impelling'fan mounted on said spindle below said atomizing head and within and adjacent to the lower end of said inner member whereby it is driven by the natural draft of air'induced through said inner member by the combustion withinjthe burner, and a fuel nozzle. delivering to said atomizing head.

burner, the combination of cy- 6. In an oil burner, the combination of cylindrical outer, inner and intermediate burner members disposed in spaced concentric re- 1ation,the outer and inner members being open at the bottom, the inner member having an outwardly curved flange at its upper end resting on the top of theouter member, the intermediate member having a bottom spaced from the lower-end of said inner member, whereby a return air passage is provided delivering into the bottom of said inner member, said bottom being conformed to provide a trough, the trough having. clean-outopenings therein, a damper for said clean-out openings, a drain connection for said trough, a spindle disposed vertically and centrally of said inner member, an atomizing head mounted on said spindle within said inner member, and a spindle driving fan mounted on said spindle below said atomizing head to be subject to and driven by the draft of air created by the combustion. I

7. In an oil burner, the combination of a burner body having a central combustion chamber open at the top, the walls of said body being disposed to provide an annular air passage comprising an outer up-dra'ft portion open at the bottom of the body and an inner V down-draft portion delivering to the lower end of the combustion chamber, the wall of the combustion chamber constituting the inner wall of thedown-draft portionofsaid air .passage, said body having abottom provided with acentral air inlet, a spindle disposed centrally of said combustion chamber, a bearing for said spindle disposed centrally of said airinlet in said bottom, a lubricant connection for said bearing, an impelling, fan disposed on said spindle adjacent the lower end of said combustion chamber, an atomizing head on said spindle, and a fuel nozzle delivering to said atomizing head.

8. In an oil burner, the combination of a burner body having a central combustion chamber open'atthe top and bottom, the walls of said body being disposed to. provide an annular air passage comprising an outer up draftportion open at the bottom. of the body and an inner down-draft portion delivering to the lower end of the combustion chamber, the wall of the combustion chamber constituting the inner wall of the down-draft portion of said air passage, a spindle disposed centrally i of said combustion chamber, an impelling fan disposed on said spindle adjacent the lower end of said combustion chamber so that it is driven by the current of air induced through said combustion chamber by the combustion of fuel therein, an atomizing head mounted on said spindle within said'combustion chamber so that the air passing through said combustion chamber passes said atomizing head, iilndda fuel nozzle delivering to said atomizing 9. In an oil burner,the combination of a 

